Stone of Trials
"You got the Stone of Trials! This engraved object was created to lead the chosen hero to the hidden location of the Triforce!"
The Stone of Trials is an item obtained in Skyward Sword. This item is a gift from the Goddess Hylia, and can be received after completing the final Silent Realm in Skyloft. Link must then place it into the empty eye socket of a specific bird statue on Skyloft, which in turn reveals the entrance to Sky Keep, the location where the Triforce is being held. The Stone of Trials is required if Link wishes to reach Sky Keep and retrieve the Triforce.